Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Mass rapid rail system in Bangkok and Pathum Thani, Thailand
Most of the railway runs alongside existing national railroad tracks, eventually replacing them. Segments running through inner-city areas are elevated, and the system is electrified by overhead lines. The system was developed and is owned by the State Railway of Thailand. Since the Red Lines run roughly along the alignment of the failed Hopewell Project, they have been described as a "Hopewell revival".
โครงการระบบรถไฟชานเมือง (สายสีแดง) [Commuter rail system project (Red Line)]. SRT website (in Thai). State Railway of Thailand. Retrieved 20 January 2012.
"Reviving the former Hopewell route", translated and summarized by Wisarut Bholsithi from Prachachart Thurakij, 4–7 March 2004. "This Northern Commuter has to connect with the Airport Link which is not even at the design stage. At the minimum, the detailed design for the Airport Link must be done by July 2004. The Hopewell revival will be an elevated single floor—either shared tracks or separated tracks for High Speed Rail, DMU/Diesel Tracks, and Red Line Commuter which all have to be done in six years. The elevated section will end at Don Muang and then it will be at grade with separated tracks."